00:01
The rough sketch that they are referring to is going to be a sketch that shows the energies get closer to each other as we increase the energy levels.
00:13
So if this is energy level one, energy level two is pretty far away, and then energy level three is closer, and then four is even closer to three, then three, two, two.
00:40
And then we've got five even closer.
00:47
And then the closest of all is going to be energy level six to energy level five.
01:01
They then ask you to make a vertical arrow that shows a transition from energy level five to energy level two.
01:12
So they're looking for something like this, energy level five down to energy level two.
01:23
Then they want you to calculate the energy for this.
01:30
Transition.
01:31
To do that, we use the riddberg equation where the change in energy is equal to negative 2 .178 times 10 to the negative 18, multiplied by 1 over the final energy level 2 squared, minus 1 over the initial energy level 5 squared.
01:54
And we get 4 .57 times 10 to the negative 19 joules per photon or per transition.
02:07
So this would be for a single hydrogen electron undergoing the transition.
02:13
To determine for part d the energy associated with a kilojule, in kilojoules per mole, we simply need to, i'll show you.
02:25
Let's move down here...